baber/WOPTO huggingface dataset:
Patent GB-715344-A (GB)
Title: Improvements in or relating to electrical equipment of the kind adapted to provide an electric signal which is substantially proportional to the product of two quantities
IPC: G06G7/16
Filed: 1951-12-21
Abstract: 715,344. Electric analogue computors. GENERAL ELECTRIC CO., Ltd., and KIRKNESS, R. H. March 23, 1953, [Dec. 21, 1951.] No. 30061/51. Class 37. In equipment of the kind which provides an electric signal substantially proportional to the product of two given quantities A and B, an oscillator 5 and a phase-splitting network 6 supply two oscillations having the same frequency but a relative phase difference of 9o degrees to two modulators i and 2 where each is amplitudemodulated by signals. representing one of the two quantities A and B; the two amplitude-modulated oscillations are fed simultaneously to a circuit 8 of which the characteristic at least approximately follows a square law, and a device 9 derives a signal having a magnitude dependent upon the product of the two quantities A and B from an oscillatory component in the output of the circuit 8 which has a frequency twice that of the oscillations supplied by the oscillator 5. Thus the input to the squaring circuit 8 may be written A sin (wt + °) + B cos (wt + °), its output then being proportional to the square of this expression, which can be shown to be equal to ¢[(A<SP>2</SP>+B<SP>2</SP>) + (B<SP>2</SP>-A<SP>2</SP>) cos a(wt+°)]+AB sin 2 (wt+°). The last term has an amplitude proportional to the required product AB, and this component is selected by means of the phase-sensitive device 9 to which a frequency doubler 11 supplies an oscillation of the required double frequency through a phase-shifting network I3 which is adjusted so that there is no output from the device 9 when either of the given quantities A and B is zero. In an alternative arrangement the oscillations in quadrature supplied to the modulators i and 2 are produced as described in Specification 703,192, [Group XL(c)]. The modulators i and 2 may be of the type described in Specification 715,353, [Group XL(c)]. The squaring circuit may be as shown in Fig. 2, comprising two matched pentodes 2 and 22 having a common anode load resistor 23, the input signals being supplied in anti-phase to the control grids 24 and 25 by means of a phase-splitting network 26.
Patent GB-795343-A (GB)
Title: Support for a drawing board
Inventor: LAWES FRANCIS GEORGE RYLAND
IPC: A47B27/18
Filed: 1954-10-19
Abstract: 795,343. Easels; adjustments. LAWES BROS., Ltd. Sept. 29, 1955 [Oct. 19, 1954], No. 30118/54. Class 52(3) A support for a drawing board 1 comprises bars 3 mounted on battens 2 on the back of the board and slidable within bearing members 4 secured to a support 5, locking mechanism consisting of levers 10, 11 on pivots 8, 9 and each having a curl 12 embracing the respective bar 3, the levers being tilted by springs 13, 14 and preventing sliding by friction grip, the locking being released by means of a rod 20 mounted within a tube 18 pivoted to support 5 and carrying a cross bar 17 which engages pins 15, 16 on the levers 10, 11 to overcome the spring biasing and allow sliding. In a modification (Fig. 4) movement of a rod 38 over a cam surface on portion 34 of bar 32 connected to a bar 29 causes the latter to rock and overcome the biasing action of the springs 13, 14.
Patent GB-754995-A (GB)
Title: A safety valve in water main taps and the like
Inventor: HENRIKSON JULIUS GOTTFRID
IPC: F16K43/00
Filed: 1954-10-20
Abstract: 754,995. Water-taps. TESCH, L. H. Oct. 20, 1954, No. 30145/54. Class 135. In a screw-actuated water-tap having an upstanding inlet and a jumper 1, Fig. 1, movable towards its seat 2 against liquid flow, a valve member 3 which seats on a seat 9 upstream of the seat 2 on removal of the valve head to permit, e.g., renewal of the jumper, is normally held off its seat by a pin 8 on the jumper and provided with a dependent guide pin 4 guided in a sheet metal guide 7, Fig. 2, having a tubular central portion and webs extending therefrom resiliently pressing against the tap body. The pin 8 may be replaced by an upstanding pin on the valve member 3.
Patent GB-1142048-A (GB)
Title: Articulated buckle
IPC: A44B11/24
Filed: 1966-07-05
Abstract: 1,142,048. Buckles. A. S. STEINBERG [trading as A.C.F.A. SOC. ACC. CEMPLICE DI ADALBERTO SUSSMAN STEINBERG & CO.] 5 July, 1966 [7 July, 1965], No. 30209/66. Heading E2A. An articulated buckle comprises a frame 2, a tongue 8 pivoted on one side 3 of the frame and adapted to pass through a hole in a strap and extension member 4 on said one side of the frame extending outwardly therefrom and adapted to be fastened to the strap and a loop member 11 pivoted on said one side of the frame and partially covering the extension member 4 when it is in a lowered position. As shown the extension member is a plate having a hole therein for receiving a rivet but in an alternative construction the extension member has prongs positioned between a pair of lugs, the lugs being intended to be bent round the strap with the prongs penetrating the strap.
Patent GB-748849-A (GB)
Title: A tool holding socket having an ejector
IPC: B23B31/06
Filed: 1953-11-02
Abstract: 748,849. Sockets. HASS. NER, K. Nov. 2, 1953 [Nov. 4, 1952], No. 30223/53. Class 83 (3). A socket 1 for holding a tapered-shank tool 3 having a convex upper end on its tang 5 comprises an ejector 9 passing through a flat tang 8 at the upper end of the socket, the end of the ejector being shaped concavely and having a recess 15 therein. The tang 5 of the tool is positioned by a pin 6. The recess 15 ensures that the centre bore 16 of the tool is not damaged when the ejector is struck.
Patent GB-734793-A (GB)
Title: Improvements in or relating to polynuclear cyanine dyes
Inventor: KENDALL JOHN DAVID
IPC: C09B23/04
Filed: 1952-11-28
Abstract: Trinuclear cyanine dyes are described which have one of the following formul  <FORM:0734793/IV (c)/1> <FORM:0734793/IV (c)/2> or <FORM:0734793/IV (c)/3> wherein R1, R2, R3, R5 and R6 are alkyl groups or R1 and R2 may be aralkyl groups or may together form an aliphatic carbocyclic system such as cyclopentamethylene, R7 is a hydrocarbon group or is linked through C and N to a carbon atom in D3, X is an anion, n is 0 or 1, and D1, D2 and D3 complete 5- or 6-membered heterocyclic nuclei.  The symmetrical dyes of formula I may be prepared by condensing a compound of formula <FORM:0734793/IV (c)/4> wherein R4 is an alkyl group, with at least 2 molecular proportions of a quaternary cyclammonium salt having a reactive methyl group in the presence of a base at least as strong as triethylamine.  In place of the iminazolenine quaternary salt, the free base may be employed together with an equivalent of a salt R3X where R3 has the same value as R4.  The unsymmetrical dyes of formula I and the dyes of formul  II and III may be prepared by condensing compounds of the formul  <FORM:0734793/IV (c)/5> or <FORM:0734793/IV (c)/6> with the appropriate methyl quaternary cyclammonium salt or heterocyclic keto-methylene compound, in the presence of a strong base.  In place of the quaternary cyclammonium salt used in any of the above reactions, the base may be employed together with an equivalent of a salt R3X, when dyes are produced wherein R5 = R3.  D1 and D2 may be the residues of thiazole, benzthiazole, benzoxazole, or benzselenazole nuclei or their polycyclic homologues, or the residues of quinoline or indolenine nuclei, any of which nuclei may be substituted in the carbocyclic rings with alkyl, aryl, alkoxy or halogen p  substituents.  D3 may be a residue of rhodanine, 5-pyrazolone or thiazolidones, including (with R7) 2 : 3-benziminazo-21 : 11-4-thiazolidone.  Specification 734,792 is referred to.  According to the Provisional Specification dyes of formul  I to III and of formula <FORM:0734793/IV (c)/7> wherein R8 is hydrocarbon and D4 completes a heterocyclic nucleus, are made by reacting intermediates of formul  <FORM:0734793/IV (c)/8> or <FORM:0734793/IV (c)/9> with quaternary salts of heterocyclic nitrogen compounds having a reactive methyl group or with a heterocyclic nitrogen compound having a reactive ketomethylene group. The various substituents R are defined in wider terms and additional examples of nuclei D1 to D4 are given.
Patent GB-1122101-A (GB)
Title: Random access information storage device
IPC: G11B15/38
Filed: 1965-07-28
Abstract: 1,122,101. Data stores. POTTER INSTRUMENT CO., Inc. 28 July, 1965 [28 July, 1964], No. 30263/65. Heading G5R. In a random access information store, one of a number of cartridges 37, Fig. 1 (not shown) each containing loops 60 of storage tape, is selectively mounted on arms 38 which move along slides 41, Fig. 2, to position the tapes over a transducing assembly 31, a control selecting an appropriate tape and one track thereon. Cartridge mounting. When the selected cartridge 37 is located on the arms 38, air, supplied over pipe (67) escapes through holes 65 in cylinders 61 to tension the tapes 60 and to provide an air bearing when a tape is subsequently driven. As the cartridge is moved to its transducing position, the tapes are guided by the bevelled end of cylindrical bar 51 over the magnetic heads 241 and by cam guides 91 over the tape guides 87, Fig. 17 (not shown). At the end of the movement, when the selected cartridge is adjacent wall 33, shafts 159 are rotated so that arms 161 raise plates 121, 125 and the machined end faces of cylinders 61 are attracted to permanent magnets 163, thereby positioning them. The cam guides 91 are withdrawn when the cartridge is in position, Fig. 19. Tape and track selection. A vacuum pump is connected over manifold 179 to valve 185 and as shown in Fig. 19, the tape is drawn away from magnetic head 241, the tension preventing the capstan 49 from being operative. When valve 185 is changed over by energization of the appropriate rotary solenoid 203, Fig. 20 (not shown), the vacuum in pipe 187 brings the tape in contact with the capstan 49, and the magnetic head 241. The capstan is provided with grooves (249) to prevent an air bearing from forming. In order to effect track selection, the head carrier 51 is moved to one of sixteen positions by operation of one or more rotary solenoids 205 ... 208 which are interconnected through cranks, Fig. 14 (not shown) and by providing three heads across each tape width, any one of forty-eight tracks may be selected. A cartridge is removed by reversal of the above operations.
Patent GB-300789-A (GB)
Title: Improvements in the construction of rotors for high speed machines
IPC: H02K1/28
Filed: 1927-11-11
Abstract: 300,789. English Electric Co., Ltd., Sloan, A. D., and Youngmark, F. A. Nov. 11, 1927. Cores.-In rotors for turbo - alternators &c. made, as described in Specification 236,717, of sections secured together by means of projections on the sections screwing into the adjacent sections, the sections are further secured together by longitudinal bolts. The rotor may be formed of a central cylindrical portion 1 and two end discs 10, 11 formed integral with the shaft portions 12, 13 and having circular projections 8, 9 screwing into recesses on the piece 1. The outer parts 4, 5 of these recesses may be plain and the inner parts screwed, the projections 8, 9 being formed to correspond. The inner portions of the piece 1 may be slightly recessed at the ends as shown at 17, so that the pieces 10, 11 only take a bearing on the outer ring. Passages 15 for the reception of bolts, terminating in recesses 16 for the nuts or bolt-heads, are formed through the pole-pieces of the rotor so as to avoid the winding-slots. The piece 1, in addition to being secured as described, may be shrunk on to the pieces 10, 11.
Patent GB-245914-A (GB)
Title: Improvements in bakers' ovens
IPC: A21B1/14
Filed: 1924-12-17
Abstract: 245,914. Hawkins, C. Dec. 17,1924. Bakers' ovens. - A movable sole plate g is pivoted to the oven structure at its forward end and rests at its rear end upon adjustable cams h. The baking-chamber a having its entrance at a<2> is built into the furnace c and heated by nests of tubes d heated in the flues e from a fire-place f. The cams h are fixed to a transverse shaft h<2> having at its end a worm-wheel engaging a worm on a side shaft rotatable from the front of the oven by a hand-wheel ; the sole plate may thus be tilted by turning the hand-wheel. The sole plate consists of a frame of angle iron filled in with tiles.
Patent GB-883460-A (GB)
Title: Improvements in yarn guiding devices
IPC: B65H57/00
Filed: 1957-09-27
Abstract: 883,460. Thread guides in textile spinning &c. machines. TURNER & SON Ltd., BENSON, and FREEMAN, A. R. Sept. 8, 1958 [Sept. 27, 1957], No. 30307/57. Class 120(2) An arm, carrying a yarn guide 52 and mounted in a twisting or winding machine so as to hold the guide adjacent a cop or yarn package from which yarn is withdrawn, is articulated so that it can be swung laterally clear of the path of the package being placed on or removed from the machine. The arm comprises two parts 10 and 12 a finger 16 and limit stop 18 on which engage in the working position. An arm 42 forming part of the guide is pivotally mounted, and located by a stop 46, on the part 12. The part 10 may be clamped in position by a bracket 22 and carry a yarn tensioner 34.
Patent GB-153023-A (GB)
Title: Improvements in or relating to internal combustion engines
IPC: F01L13/06
Filed: 1920-10-26
Abstract: 153,023. Miesse, J. Feb. 28, 1916, [Convention date]. Void [Published under Sect. 91 of the Act]. Brakes, counter-pressure.-In order to use the engine to brake the vehicle, a rod 26 in the steering-column is turned so as to close the throttle (by connexions not shown), rotate a spindle 22 and cam 23 to hold open an air-inlet valve 24 in the induction pipe, and shift the cam-shaft 17 axially so as to throw the exhaust cam 16 out of action and to bring into action a special exhaust cam 18. Tho engine then draws in air through the admission valve 11 during the suction stroke and compresses it on the upstroke: the air is released through the exhaust valve 14 at or after the end of the upstroke, and draws in air through the exhaust valve 14 on the next downstroke; this air is compressed on the upstroke and released through the valves 11, 24 at the end of the stroke. The degree of braking is controlled by adjusting the rod 26, so as to vary the extent of opening the valve 24, and the longitudinal position of the tapered cam 18 for the exhaust valve.
Patent GB-536592-A (GB)
Title: Improvements in or relating to tubulous vapour generators
IPC: F22B37/12
Filed: 1939-11-18
Abstract: 536,592. Water-tube steam boilers. BABCOCK & WILCOX, Ltd. (Bailey, E. G.). Nov. 18, 1939, No. 30346. Drawings to Specification. [Classes 64 (iii) and 123 (ii)] A boiler tube through which a mixture of steam and water flows is formed with a number of shallow helical grooves on its inner surface to maintain a suitable quantity of water on the wall of the tube. The grooves are rectangular in cross-section and have a pitch of 60 degrees. The grooves in adjacent lengths of horizontal tubes connected in series are oppositely inclined. Specification 503,775 is referred to.
Patent GB-804178-A (GB)
Title: Improvements in or relating to resinous coatings and coating compositions
IPC: H01B3/30
Filed: 1955-10-24
Abstract: Articles are coated by applying a composition which comprises a volatile liquid in which is dispersed polytetrafluoroethylene and dissolved or dispersed therein in an amount from 5 to 100 per cent by weight of the polymer, a thermosettable phenolaldehyde resin, removing the volatile liquid and heat-curing the remaining composition.  The composition may also contain a film-forming material such as an acrylonitrile copolymer, or polyvinyl butyral, and a coalescing agent.  The article may be a metal tank, a metal screen, a bonderized or untreated steel panel or have a surface of glass, asbestos, aluminium, copper, acrylic resin or ceramic.  The aldehyde resin may be made by reacting a phenol such as monohydroxybenzene, cresol, xylenol, resorcinol, phenyl phenol, or a butyl phenol with formaldehyde or furfuraldehyde.  Specified coalescing agents are furfuryl alcohol, tetramethylene sulphone, monoalkyl ethers of ethylene or diethylene glycol, diacetone alcohol, and dimethyl formamide.  The volatile liquid may be water or a mixture of organic solvents selected from ethyl and butyl alcohols, methyl ethyl ketone, toluol, xylol and octane.  The coatings are cured by heating.  Specifications 631,504, 631,570, [both in Group IV (a)], and 761,928 are referred to.ALSO:A coating composition comprises a volatile liquid having dispersed therein polytetrafluoroethylene and dissolved or dispersed therein from 5 to 100 per cent by weight of the polymer a thermosettable phenol - aldehyde resin.  The composition may also contain a film-forming material, e.g. an acrylonitrile copolymer or polyvinyl butyral and a coalescing agent for this material.  The aldehyde resin may be made by reacting a phenol such as monohydroxybenzene, cresol, xylenol, resorcinol, phenyl phenol, or a butyl phenol with formaldehyde or furfuraldehyde. The exemplified resin is a condensate of monohydroxybenzene and formaldehyde.  The copolymer may be a three-component copolymer of acrylonitrile, an acid selected from acrylic, methacrylic, ethacrylic, phenyl acrylic, or crotonic, and an ester of a monohydric alcohol with one of the above acid, or the copolymer may have four components, i.e. in addition to the above three allyl glycidyl ether, or a glycidyl ester of one of the above acids.  Specified coalescing agents are furfuryl alcohol, tetramethylene sulphone, monoalkyl ethers of ethylene or diethylene glycol, diacetone alcohol, and dimethyl formamide.  The volatile liquid may be water or a mixture of organic solvents selected from ethyl and butyl alcohols, methyl ethyl ketone, toluol, xylol, and octane.  The compositions may be used for coating metal panels and tanks, copper wire, ceramics, glass fabrics, and fibres and films made from regenerated cellulose, polyacrylonitrile, and polyethylene terephthalate.  The coating is cured by heat-treatment. Specifications 631,504, 631,570 and 761,928 are referred to.
Patent GB-495233-A (GB)
Title: Improved lubricant conditioning system particularly for internal combustion engines
IPC: F01M5/00
Filed: 1937-11-06
Abstract: 495,233. Fluid - actuated valves. UNITED AIRCRAFT PRODUCTS, Inc. Nov. 6, 1937, No. 30471. Convention date, Nov. 7, 1936. [Class 135] [Also in Group XIII] A lubricant cooling system for internalcombustion engines comprises an air-cooled radiator 1, Fig. 3, having a jacket 5 forming a byepass for the oil, the flow to the jacket and the radiator being controlled by valves 18, 20 respectively. The valve 20 is arranged to open later than the valve 18 and is loaded by a spring and the oil pressure in a bellows 30 secured at one end to the valve and connected through ducts 29 .. 26, Fig. 2, with a Venturishaped passage 23 opening into the oil inlet space 17.
Patent GB-208330-A (GB)
Title: Improvements in telephone apparatus
IPC: H04R11/00
Filed: 1922-11-07
Abstract: 208,330. Schmidt, L. Nov. 7, 1922. Magnetic instruments.- The armature of a magnetic telephone instrument moves about a fulcrum within the bore of the coil. The armature, Fig. 5, consists of two cylindrical parts 17, 18 having tapered portions 19, of which one has a threaded stud 20 which screws into the other. Split sleeves 22, having ring portions 24 which receive the stud 20, fit tightly into the bore of the coil 14, Fig. 2, and the portions 24 form the pivot for the armature. Pole-pieces 6, 7 are secured to the limbs of a horse-shoe magnet 5, and pole-shoes 11, 12 project inwardly therefrom. The inner faces of the pole-shoes are concave and eccentric with respect to the armature. A rod 29 extends loosely through an opening 2 in the end of the armature with its head resting in the groove 28, Fig. 5, and is attached to a mica diaphragm 31, Fig. 2. This ensures that the rod is always perpendicular to the diaphragm. A split sleeve 30<1> fits over the reduced end of the armature so as to ensure a pivoted action of the rod 29. The instrument may be used either as a transmitter or receiver.
Patent GB-1082977-A (GB)
Title: Quaternary oxa-, selena- and thio-azole derivatives and cyanine dyes derived therefrom
Inventor: RIESTER OSKAR
IPC: G03C1/34
Filed: 1964-08-04
Abstract: Symmetrical and unsymmetrical cyanine dyes of the formulae <FORM:1082977/C4-C5/1> <FORM:1082977/C4-C5/2> <FORM:1082977/C4-C5/3> are prepared from quaternary ammonium salts of the formula <FORM:1082977/C4-C5/4> wherein Z1 and Z2 represent -O-, -S- or -Se-; Y1 and Y2 represent the non-metallic atoms necessary to complete a heterocyclic azole ring; R1 and R2 represent hydrogen or C1-C3 alkyl; R3 is C1 to C5 alkyl; R4 is C1 to C5 alkyl substituted with a carboxy or sulpho group; n is 1 to 3; A represents a bivalent aliphatic radical having 1-3 carbon atoms, which may be substituted by an alkyl group containing from 1 to 5 carbon atoms.  The benzene ring of the quaternary ammonium salts may contain halogen.ALSO:Compounds of the general formula <FORM:1082977/C2/1> are prepared by heating (1) a compound of the general formula <FORM:1082977/C2/2> in contact with an acid of the formula HX or (II) a compound of the formula <FORM:1082977/C2/3> to a temperature of from 70 DEG  to 200 DEG  C. when Compound I is used and to a temperature of from 80 DEG  to 120 DEG  C. when Compound II is used and continuing to heat until the cyclization is substantially completed, wherein Z1 represents -O-, -S- or -Se-; Y1 represents the non-metallic atoms necessary to complete a heterocyclic azole ring; A stands for a bivalent aliphatic radical having 1-3 carbon atoms which may be substituted by an alkyl group containing from 1 to 5 carbon atoms; and X represents an anion. In examples (1) 2-(hydroxyethyloxymethyl) - benzthiazole is obtained by reacting 2-chloromethylbenzthiazole with ethylene glycol and then cyclized by heating with p-toluene sulphonic acid; (2) 2-(hydroxyethyloxymethyl) - 5 - methylbenzthiazole, which is cyclized by heating with p-toluene sulphonic acid, is prepared by reacting ethylene glycol and 2-chloromethyl-5-methyl-benzthiazole, which is itself prepared by reacting 2 - mercapto - 5 - methyl aniline with monochloroacetic acid and polyphosphoric acid; (3) 2 - (hydroxyethyloxymethyl) - 5 - chlorobenzthiazole is prepared by reacting 2-chloromethyl-5-chlorobenzthiazole with ethylene glycol and cyclized by treating with p-toluene sulphonic acid; (4) 2-[21-hydroxypropyl-oxymethyl) - p - toluene - sulphonic acid ester]-benzthiazole, which is cyclized on heating, is prepared by reacting 2-chloromethyl-benzthiazole with propane-1,2-diol, and treating the product with p-toluene-sulphochloride.